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Fair Value Measurements (Schedule of Other Investments) (Details) - USD ($)
$ in Millions
Sep. 27, 2018
Dec. 28, 2017
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]    
Other investments $ 2.1 $ 2.5
Total other investments 3.2 3.5
AC JV, LLC    
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]    
Investment in AC JV, LLC $ 1.1 $ 1.0